131024605 has 4 divisors (see below), whose sum is σ = 157229532. Its totient is φ = 104819680.

The previous prime is 131024591. The next prime is 131024609. The reversal of 131024605 is 506420131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45887076 + 85137529 = 6774^2 + 9227^2 .

It is not a de Polignac number, because 131024605 - 2⁷ = 131024477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131024609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13102456 + ... + 13102465.

It is an arithmetic number, because the mean of its divisors is an integer number (39307383).

Almost surely, 2^131024605 is an apocalyptic number.

It is an amenable number.

131024605 is a deficient number, since it is larger than the sum of its proper divisors (26204927).

131024605 is an equidigital number, since it uses as much as digits as its factorization.

131024605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26204926.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131024605 is about 11446.5979662081. The cubic root of 131024605 is about 507.9071029524.

Adding to 131024605 its reverse (506420131), we get a palindrome (637444736).

The spelling of 131024605 in words is "one hundred thirty-one million, twenty-four thousand, six hundred five".